Improve Efficiency in Dye-Sensitized Solar Cell by Surface modification of TiO2 Photoelectrode by Spray Pyrolysis

Abstract

Pure TiO2 and surface-modified TiO2 (SMT) films from zinc acetate solution have been developed with fluorine-blended SnO2 (FTO) auxiliaries. support material using spray pyrolysis for use into dye-sensitation solar cells (DSCs). Powder X-ray diffraction (PXRD) profiles indicate that pure TiO2 and SMT exhibit the same crystal structure. Optical absorption studies do not indicate a significant absorption difference between SMT and pure TiO2. Impedance measurements reveal that ZnO covered on TiO2 nanoparticles increase particular exterior imepedance also suppress about reverse transmission from photo-induced electron emmiting with SMT to the electrolyzer. Surface morphology and surface fundamental study were performed using FE-SEM, field emission scanning electron microscopy and EDX, energy dissipation X-ray spectroscopy. The photo electrochemical (J-V curves) values of DSCs for pure SMT and TiO2 thin films have been relatively investigated. Outstanding results display such that about bypassed photo electric current (JSC) of pure TiO2 increased from 16.73 mAcm− 2 to 18.09 mAcm− 2 additionally through open-loop voltage (VOC) for DSCs containing SMT thin films changed between 0.71 V to 0.75 V. This indicates that the ZnO layer on TiO2 nanoparticles contributes to the surface resistance, which impedes the flow of back scattered electrons to the electrolyte significantly. Cell power transformation productivity has been increased about 8.25 to 9.3%.